6. a) Free radical polymerization is quite versatile and has been used industrially to prepare numerous commercial products. (i) Discuss two desirable characteristics of free radical polymerization. (ii) Write equations showing two possible termination reactions involved in the free radical polymerization of methyl methacrylate. b) Over the past several years considerable effort has been devoted to rendering free radical poly- merization "living. Under benzoyl peroxide-initiated living free radical polymerization mediated by TEMPO, styrene gives a straight line that passes through the origin in the Mn vs. conversion plot. Sketch roughly what the same plot will look like under the following conditions: i) Chain transfer begins to occur to toluene (solvent) added to facilitate better stirring at 50% conver- sion. ii) When camphorsulfonic acid, a rate enhancing agent, is added at the start of the reaction, the propagation becomes faster than initiation. 6. a) Free radical polymerization is quite versatile and has been used industrially to prepare numerous commercial products. (i) Discuss two desirable characteristics of free radical polymerization. (ii) Write equations showing two possible termination reactions involved in the free radical polymerization of methyl methacrylate. b) Over the past several years considerable effort has been devoted to rendering free radical poly- merization "living. Under benzoyl peroxide-initiated living free radical polymerization mediated by TEMPO, styrene gives a straight line that passes through the origin in the Mn vs. conversion plot. Sketch roughly what the same plot will look like under the following conditions: i) Chain transfer begins to occur to toluene (solvent) added to facilitate better stirring at 50% conver- sion. ii) When camphorsulfonic acid, a rate enhancing agent, is added at the start of the reaction, the propagation becomes faster than initiation